Grate-bar.



1.].SHEVLIN.

GRATE BAR.

APPLICATION FILED HEB-10,1915.

Patented Dec. 18, 1917.

lNVENTOR WITNESSES: iffi k ,WM

, section or sectionsmay be readily removed UNITED STATES PATENT OFFICE.

JOHN J. sHnvLIN, or oonona, ivnwvoax.

' GRATE-BAR. 7

Specification of Letters Patent. Patehted' ])ec, 18,1917,

Application filed February 10, 1915. Serial No. 7,266.

To all whom it may concern:

Be it known that I, JOHN J SHnvLIN, a citizen of the United States, residing in Corona,borough of Queens, in the county of Queens and State of New York, have invented, a new and useful Improvement in Grate-Bars, of which the following is. a specification.

This invention relates to new and improved construction of grate bars for furnaces; and the main object of the same is to provide a grate bar that maybe removed from the rocking arm without in any manher having to tilt the rocking arm or to disturb any other grate from its normal position. I v r Another, and one of the main objects of the invention is to provide the grate bar proper with overlapping and underlapping ends, together with slots into which the head of the rocking arm rests, and by which said or replaced without disturbin others than those desired, and as has alrea y been noted, without detaching or operating any. other part to so remove such other part or parts.

These improvements permit of the grate-bar being simplified, and made more durable,

and at the same time made more economical in cost of construction as well as in opera:

tion.

With these and other objects in view, the

invention consists of certain features of construction above noted, also in the combinat10nand arrangement of parts, as will be more fully described and specifically pointed out in the claims.

In the accompanying" drawing which forms part of this specification, Figure 1 is a vertical sectional view through the grate,

7 other parts beng omitted for clearness; Fig. 2is adetached sectional view of the rocker arni, Fig. 3 isa detached sectional view of one of the grate sections, and Fig. 4 is a sectional view showing a modification of the slot. Y

Like reference characters designate like parts throughout the several views of the drawings. 7 The coincident feature of this inventlon that is common with all grate bars is, that they are made insections, and these various that may accumulate within the fire box,

But in all such grates there are more or less complicated ways of connectlng and detaching the individual sections, for repair or to replace the same. 7 Referring to F 1g. 1, thefront of the fire box isprovided with a bearing barv 1, which has formed at its upper edge a laterally eX-" tending lip 5, said lip being triangular'in cross section and terminating in an edge 6. The bearing bar'is provided with'a projection on which the side carrier is supported and maintained.

' A. side carrier 7 is provided to which the rocking arms is suitably secured. The rock ing arm consists of a head 9, a neck 10, and an enlarged portion 11 below which is a base flange l2. Extending downwardly from the base flange l2, and preferably at the center thereof, is a finger or bar ,13 to which is adapted to be secured a link 14. Link 14 has its'upper end l5'bifurcated to embrace the finger 13, to which it-is secured in any suitable and convenient manner,"as by the bolt 16. The lower end of said link 11 is suitably secured toan-armor rod 17, which is usually employed in furnaces, but it will be understood. that such means, or any other maybe employed for rocking the various sections of the grate bar. v

Referring particularly to Fig. 3, it will be seen that the grate bar 18 is provided with angularlips 19, and 20, t-he former extending below the top face of the bar, and which conforms to the same angle as that on the lip 5 on the bearing bar 4;. The grate bar on the upper side may be of any well known design wherein the maximum amount of space may be provided to retain the fuel, and at the same time to provide the maximum amount of space to allowthe air to" pass through for proper combustion. Referring now to the opposite end of said grate bar 18,

[it will be seen that the lip 20 conforms in all essential particulars tothat formed on the front bearing bar 4, by soproviding the grate bar with the lips so arranged, permits of any of the various sectionsthat makeup the grate, being interchangeable. Below the grate bar is'arrangeda flange 21, provided I with a slot 22 extending with nthe' same, the

height of which is such as to permit the head 9 to rest at its upper extreme, while the part 11 of said rocking arm is of such size to fit snugly within the'slot, while the loweredge ofthe-flange 21 rests uponthefiat part 12 of the rocking arm and affords a substantial bearing to support said grate bar. It Will now be seen how readily any particular grate bar may be removed without disturbing in any manner any other grate section, or any part or parts that may be connected to the rocking arm, for the manipulation of said grate. The angle of the underlapping lip 19 at the front, the same angle being provided for the slot 22, and the overlapping lip 20 of the rear of the grate bar permits of said grate bar being removed without any trouble.

Each of the several sections of grate bars are made in like manner, and as has been noted all are interchangeable at will, any number of sections of grate bars may be employed, and each of the several sections so connected-with well known means that they may be suitably operated. The new and very important feature herein, is that each section is provided with said underlapping and overlapping edges and being mounted on the rocking arm 8 so that the section may be removed.

As shown in Fig. &, the grate bar is shown with the slot 22 so modified aS to have one vertical fa Co as shown at 23, in wnich case it also permits of the individual grate bar beinglifted off the rocking arm 8 for any purpose whatsoever, such for instance as changing it from one place to another if thought necessary, ,or for replacing it, should it be broken or warped out of condition. Of course, it will be understood that any one skilled in the art may vary the angles of such inclines at the ends of the grate bar, also the slots which fit over the rocking arm, as it is apparent that the invention in sus ceptible of various modifications in its details, such as that suggested, and hence is not restricted to the eXact construction here shown.

Again as shown in said Fig. i, the rocking arm may be so arranged, that its respective contact faces 9, 11 and 12 will contact with the respective faces of the flange or flanges 21 of the gratebar. It is very important that it be understood that the bresent invention contemplates the head 9, of the rock- -ing arm 8, fitting the top of the slot 22 closely. The sides of the slots 22 are also formed so as to closely embrace the member 11 and aline with the sides of said memher, so as to hold the grate bar steady on the arm 8. The bottom 24 of the flange 21 should also rest evenly upon the upper surface of the flange 12. By this means of support, greater strength andlonger life are secured for the grate bars, as they will not warp as readily as when supported in bearings at the front 'andback. 7

Again it'will be further understood that while the preferred form is shown, yet it will be readily understood that in lieu of a single flange, orof side flanges as at present preferred, provided with suitable openings which are adapted to fit over and rest upon the rocking part, that a single web or a plurality of webs could be provided from each of which could extend an arm, the angle of which would conform to the same angle as the over and under lapping ends, and suitable pockets or other means provided in the rocking part to securely hold the same therein. Such an adaptation of the invention, is another change that may be made as has been noted, and any other like modification would come within the purview of the invention.

Grate bars have been made to rock by various devices, such as having a pivoted joint at one end, and having means at its other for rocking the same. Again they have been so designed so as to rest on a rocking arm, the slot being for the purpose of straddling the rocking means, but this is objectionable as they warp, and by reason of having only one bearing point, such sections must necessarily by replaced often. So also have grate bars been provided with over and under lapping lips, but in no case have such grate bars been provided with such over and under lappings ends at the front and rear, and also with a slot so arranged in its flange, flanges, or

sides, whereby the intermediate grate bars may be removed from the rocking arm without disturbing any connecting part or adjacent grate or grates on the same or other rocking arm.

Having now described my invention, what I claim'and desire to secure by Letters Patent of the United States is:

1. A grate bar, downwardly extending side flanges on said bar, said flanges being provided with angularly disposed open slots, a rocker arm comprising an angularly disposed portion adapted to enter and conform to the shape of said slots, a laterally disposed flange portion which forms a'seat for the flanges of the grate bar, and a downwardly extending finger, and a lever engaging said finger to rock said grate bar. 7

2. A grate bar, downwardly extending a side flanges on said bar, said flanges being provided with slots, a rocker-arm adapted to enter said slots comprising a flanged portion, a cylindrical portion, an angularly disposed neck connecting said port-ions, and a downwardly extending finger connected to the flanged portion for operatively connecting the'bar to the grate rocking means.

A grate bar, side flanges on said bar provided with downwardly and forwardly inclined slots positioned to one side of the longitudinal axis ofsaid bar, a rocker bar adapted to enter said slots and providing a seat'for the side flanges of the grate bar, and means for oscillating said rocker bar.

4. A grate bar, side flanges on said bar, said i side flanges being provided with open slots, a rocker bar adapted to enter said slots,

laterally extending flanges on said rocker bar Which form a seat for the flanges of the grate bar, the slots in the flanges and the rocker bar being so disposed as to permit each grate bar to be removed Without disturbing any other section by elevating the same rearwardly in the direction of the slots, and means for oscillating the rocker 5. A grate bar, downwardly extending side flanges on said bar, a rocker bar having Copies of this patent may be obtained for laterally extending flanges which form a seat for the flanges of the grate bar, means at an angle to the plane of the bar for holding it 15 securely to, the rocker bar, and means for oscillating the rocker bar. I

In testimony whereof, I have signed my v name in the presence of tWo subscribing Witfive cents each, by addressing the Commissioner of Patents. Washington, D. 0. 

